This error usually occurs when you have set up Visual Studio to debug an existing web application running in IIS rather than the built in ASP.NET debug web server.
IIS by default listens for web requests on port 80. In this case, another application is already listening for requests on port 80. Typically, the offending application is Skype or Apache which by default takes over listening on ports 80 and 443 when installed.
If you do development in Apache too go to httpd.conf and find for below lines:
Replace the port with some other port like 81 or 8080. Restart IIS and you are good to go.
If you think Skype is culprit do the following:
Skype -> Tools -> Options -> Advanced -> Connection:
Uncheck “Use port 80 and 443 as alternatives for incoming connections”
This will free those ports from skype; again Restart IIS and you are good to go!
A curated list of delightful Node.js packages and resources.
- webtorrent – Streaming torrent client for Node.js and the browser.
- peerflix – Streaming torrent client.
- dat – Real-time replication and versioning for data sets.
- ipfs – Distributed file system that seeks to connect all computing devices with the same system of files.
- peerwiki – All of Wikipedia on BitTorrent.
- peercast – Stream a torrent video to Chromecast.
- BitcoinJS – Clean, readable, proven Bitcoin library.
- NodeOS – The first operating system powered by npm.
- PDFKit – PDF generation library.
- turf – Modular geospatial processing and analysis engine.
- pageres – Responsive website screenshots.
- trash – A safer alternative to
- yo – Run Yeoman generators.
- cpy – Copy files.
- torrent – Download torrents.
- David – Tells you when your package npm dependencies are out of date.
- vtop – More better top, with nice charts.
- tmpin – Adds stdin support to any CLI app that accepts file input.
- normit – Google Translate with speech synthesis in your terminal.
- is-up – Check whether a website is up or down.
- ipify – Get your public IP address.
- http-server – Simple, zero-config command-line HTTP server.
- bcat – Pipe command output to web browsers.
- slap – Sublime-like terminal-based text editor.
- jsinspect – Detect copy-pasted and structurally similar code.
- license-checker – Check licenses of your app’s dependencies.
- Lo-Dash – A utility library delivering consistency, customization, performance, & extras. A better and faster Underscore.js.
- Mout – Utility library with the biggest difference between other existing solutions is that you can choose to load only the modules/functions that you need, no extra overhead.
- immutable – Immutable data collections.
- underscore-contrib – The brass buckles on Underscore’s utility belt.
- Bacon.js – Functional reactive programming.
- Lazy.js – Utility library similar to Lo-Dash/Underscore but with lazy evaluation, which can translate to superior performance in many cases.
- request – Simplified HTTP request client.
- got / sent – A nicer interface to the built-in
- superagent – A small progressive HTTP request library.
- axios – Promise based HTTP client (works in the browser too).
- hyperquest – Streaming HTTP requests.
- spdy – Creates SPDY servers with the same API as the built-in
- Nock – A HTTP mocking and expectations library.
- download – Download and extract files effortlessly.
- wreck – HTTP Client Utilities.
Debugging / Profiling
- node-inspector – Debugger based on Blink Developer Tools.
- longjohn – Long stack traces with configurable call trace length.
- debug – Tiny debugging utility.
- njsTrace – Instrument and trace your code, see all function calls, arguments, return values, as well as the time spent in each function.
- vstream – Instrumentable streams mix-ins to inspect a pipeline of streams.
- stackman – Enhance an error stacktrace with code excerpts and other goodies.
- winston – A multi-transport async logging library.
- Bunyan – A simple and fast JSON logging library.
- intel – A comprehensive logging library (handlers, filters, formatters, console injection).
- Koa – A new web framework designed by the team behind Express, which aims to be a smaller, more expressive, and more robust foundation for web applications and APIs.
- Express – A minimal and flexible web application framework, providing a robust set of features for building single and multi-page, and hybrid web applications.
- Hapi – A rich framework for building applications and services.
- LoopBack – Powerful framework for creating REST APIs and easily connecting to backend data sources.
- SailsJS – An MVC web framework with a modern twist, supporting WebSockets, streams, and a data-driven API.
- Restify – A node framework built specifically to enable you to build correct REST web services.
- Derby – MVC framework, making it easy to write realtime, collaborative applications that run in both Node.js and browsers.
- Interfake – Rapid prototyping framework for making mock HTTP APIs, with a Node, command-line and HTTP interface.
- chalk – Terminal string styling done right.
- minimist – Parse command-line flags.
- get-stdin – Easier stdin.
- Inquirer.js – Interactive command-line prompt.
- update-notifier – Update notifications for your CLI app.
- sudo-block – Block users from running your app with root permissions.
- configstore – Easily load and persist config without having to think about where and how.
- insight – Helps you understand how your tool is being used by anonymously reporting usage metrics to Google Analytics.
- sparkly – Generate sparklines ▁▂▃▅▂▇
- blessed – A curses-like library.
- cli-table – Pretty unicode tables.
- drawille – Draw on the terminal with unicode braille characters.
- progress – Flexible ascii progress bar.
- log-symbols – Colored symbols for various log levels.
- columnify – Create text-based columns suitable for console output. Supports cell wrapping.
- googleauth – Create and load persistent Google authentication tokens for command-line apps.
- figures – Unicode symbols with Windows CMD fallbacks.
- cli-cursor – Toggle the CLI cursor.
- ascii-charts – ACII bar chart in the terminal.
- npm – A package manager for Node.js and the web.
- Bower – A package manager for the web.
- Component – A package manager for building better web apps.
- Duo – A next-generation package manager for the front-end.
- jspm.io – Frictionless browser package management with support for ES6, CommonJS, AMD modules.
- gulp.js – Streaming and fast build system that favors code over config.
- grunt – Task runner that can perform repetitive tasks like minification, compilation, unit testing, linting, etc.
- Broccoli – A fast, reliable asset pipeline, supporting constant-time rebuilds and compact build definitions.
- browserify – Browser-side require() the Node.js way.
- webpack – Packs CommonJS/AMD modules for the browser.
- Brunch – Front-end web app build tool with simple declarative config, fast incremental compilation, and an opinionated workflow.
- johnny-five – Firmata based Arduino Framework.
- serialport – Access serial ports for reading and writing.
- usb – USB library.
- cylon.js – Next generation robotics framework with support for 26 different platforms.
- handlebars.js – A superset of Mustache templates which adds powerful features like helpers and more advanced blocks.
- hogan.js – Twitter’s small, fast, phase-separated compiler for Mustache templates.
- Jade – High performance template engine heavily influenced by Haml.
- nunjucks – A powerful templating engine with inheritance, asynchronous control, and more (jinja2 inspired).
- Docco – A quick-and-dirty documentation generator which produces an HTML document that displays your comments intermingled with your code.
- JSDoc – API documentation generator similar to JavaDoc or PHPDoc.
- jsdox – JSDoc3 to Markdown documentation generator.
- apiDoc – Inline documentation for RESTful web APIs.
- del – Delete files/folders using globs.
- globby – Glob files with support for multiple patterns.
- cpy – Copy files.
- rimraf – Recursively delete files like
- mkdirp – Recursively create directories like
- graceful-fs – Drop-in replacement for the
fs module with various improvements.
- fs-extra – Extra methods for the
- fs-write-stream-atomic – Like
fs.createWriteStream(), but atomic.
- lnfs – Force create symlinks like
- chokidar – Filesystem watcher which stabilizes events from
fs.watchFile as well as using native
fsevents on OS X.
- gaze – A globbing watch module which uses custom native binaries to listen to filesystem events.
- each-async – Async concurrent iterator like forEach.
- async – Provides straight-forward, powerful functions for working with asynchronousity.
- after-all-results – Bundle results of async functions calls into one callback with all the results.
- co – The ultimate generator based flow-control goodness.
- suspend – Generator-based control flow that plays nice with callbacks, promises, and thunks.
- native-promise-only – A polyfill for native ES6 Promises.
- Bluebird – A fully featured promise library with focus on innovative features and performance.
- Q – A tool for making and composing asynchronous promises.
- zone – Provides a way to group and track resources and errors across asynchronous operations.
- through2 – Tiny wrapper around streams2 Transform to avoid explicit subclassing noise.
- concat-stream – Concatenates a stream into strings or binary data.
- simple-bufferstream – Turn a Buffer into a ReadableStream.
- co-stream – co generator stream.
- byline – Super-simple line-by-line Stream reader.
- first-chunk-stream – Transform the first chunk in a stream.
- duplexify – Turn a writeable and readable stream into a single streams2 duplex stream.
- pumpify – Combine an array of streams into a single duplex stream.
- from2 – Convenience wrapper for ReadableStream, inspired by
- from2-array – Create a
from2 stream based on an array of source values.
- peek-stream – Transform stream that lets you peek the first line before deciding how to parse it.
- binary-split – A fast newline (or any delimiter) splitter stream.
- multistream – Combine multiple streams into a single stream.
- graphicsmagick-stream – Fast conversion/scaling of images using a pool of long lived graphicsmagick processes.
- readable-stream – Mirror of Streams2 and Streams3 implementations in core.
- s3-upload-stream – Upload a stream to an Amazon S3 bucket using multipart upload.
- through2-concurrent – Transform object streams concurrently.
- Socket.io – Enables real-time bidirectional event-based communication.
- SockJS – Low latency, full duplex, cross-domain channel browser-server, with WebSockets or without.
- SocketCluster – Scalable HTTP + WebSocket engine which can run on multiple CPU cores.
- Primus – An abstraction layer for real-time frameworks to prevent module lock-in.
- Straw – Real-time dataflow framework.
- sharp – The fastest module for resizing JPEG, PNG, WebP and TIFF images.
- image-type – Detect the image type of a Buffer/Uint8Array.
- gm – GraphicsMagick and ImageMagick wrapper.
- Underscore.string – Collection of string manipulation utilities.
- he – A robust HTML entity encoder/decoder.
- iconv-lite – Convert character encodings.
- escape-string-regexp – Escape RegExp special characters.
- indent-string – Indent each line in a string.
- strip-indent – Strip leading whitespace from every line in a string.
- detect-indent – Detect the indentation of code.
- i18n-node – Simple translation module with dynamic JSON storage.
- string-length – Get the real length of a string – by correctly counting astral symbols and ignoring ansi escape codes.
- speakingurl – Generate a slug from a string with transliteration.
- ndarray – Multidimensional arrays.
- mathjs – An extensive math library.
- css – CSS parser / stringifier.
- strip-json-comments – Strip comments from JSON.
- marked – A markdown parser and compiler built for speed.
- remarkable – A very fast markdown parser with 100% CommonMark support, extensions and syntax plugins.
- js-yaml – Very fast YAML parser.
- URI.js – URL mutation.
- JSONStream – Streaming JSON.parse and stringify.
- csv-parser – Streaming CSV parser that aims to be faster than everyone else.
- excel-stream – Streaming Excel spreadsheet to JSON parser.
- parse5 – Fast full-featured spec compliant HTML parser.
- htmlparser2 – Forgiving HTML/XML parser.
- PostCSS – Framework for CSS postprocessors, to modify CSS.
- PEG.js – Simple parser generator that produces fast parsers with excellent error reporting.
- pretty-bytes – Convert bytes to a human readable string:
- pretty-ms – Convert milliseconds to a human readable string:
15d 11h 23m 20s.
- ms – Tiny millisecond conversion utility.
- pretty-error – Errors with less clutter.
- humanize – Data formatter for human readability.
- node-read – Extract readable content from any page.
- Archiver – Streaming interface for archive generation, supporting ZIP and TAR.
- decompress-zip – Unzip.
- tar-stream – Streaming tar parser and generator. Also see tar-fs.
- decompress – A pluggable decompression module with support for
zip files out of the box.
- get-port – Get an available port.
- ipify – Get your public IP address.
Static site generators
- Metalsmith – An extremely simple, pluggable static site generator.
- Wintersmith – Flexible, minimalistic, multi-platform static site generator.
- Assemble – Static site generator for Node.js, Grunt.js, and Yeoman.
Content management systems
- KeystoneJS – CMS and web application platform built on Express and MongoDB.
- Calipso – A simple content management system, built along similar themes to Drupal and WordPress, that is designed to be fast, flexible and simple.
- Apostrophe2 – A content management system with an emphasis on intuitive front end content editing and administration built on Express and MongoDB.
- nodeBB – A better forum platform for the modern web.
- ghost – Simple, powerful publishing platform that allows you to share your story with the world.
- Hexo – Fast, simple and powerful blogging framework.
- ODM / ORM
- Bookshelf – ORM for PostgreSQL, MySQL and SQLite3 in the style of Backbone.js.
- JugglingDB – Multi-database ORM with a common API. Supports Redis, PostgreSQL, MongoDB, MySQL, SQLite, Neo4j, memory, and more.
- Mongoose – Elegant MongoDB object modeling.
- Sequelize – Multi-dialect ORM. Supports PostgreSQL, SQLite, MySQL.
- Waterline – Datastore-agnostic tool that dramatically simplifies interaction with one or more databases.
- Iridium – A high performance MongoDB ORM with support for promises, distributed caching, preprocessing, validation and plugins.
- OpenRecord – ORM for PostgreSQL, MySQL, SQLite3 and RESTful datastores. Similar to ActiveRecord.
- Query builder
- Knex – A query builder for PostgreSQL, MySQL and SQLite3, designed to be flexible, portable, and fun to use.
- tape – TAP-producing test harness.
- Mocha – A feature-rich test framework making asynchronous testing simple and fun.
- Mochify – TDD with Browserify, Mocha, PhantomJS and WebDriver.
- loadtest – Run load tests for your web application, with an API for automation.
- istanbul – A code coverage tool that computes statement, line, function and branch coverage with module loader hooks to transparently add coverage when running tests.
- Sinon.JS – Test spies, stubs and mocks.
- Karma – Executes code in multiple real browsers.
- Nightmare – High-level PhantomJS wrapper that lets you automate browser tasks.
- matcha – A caffeine driven, simplistic approach to benchmarking.
- Passport – Simple, unobtrusive authentication.
- everyauth – Authentication and authorization (password, facebook, & more) for your Connect and Express apps.
- passwordless – Token-based authentication middleware for Express allowing authentication without passwords.
- Lockit – Full featured authentication solution for Express. Supports a variety of databases, predefined routes, email and two-factor authentication.
- n – Node.js version management.
- nave – Virtual Environments for Node.js.
- nodeenv – A Node.js virtual environment compatible to Python’s virtualenv.
- nvm for Windows – Version management for Windows.
Natural language processing
- natural – A general natural language facility.
- retext – An extensible natural language system.
- franc – Detect the language of text.
- leven – Measure the difference between two strings using the Levenshtein distance algorithm.
- node-windows – Run scripts as a native Windows service and log to the Event viewer.
- node-mac – Run scripts as a native Mac daemon and log to the console app.
- node-linux – Run scripts as native system service and log to syslog.
- forever – A simple CLI tool for ensuring that a given script runs continuously (i.e. forever).
- supervisor – Restart scripts when they crash or restart when a
*.js file changes.
- PM2 – Advanced Process Manager.
- Phusion Passenger – Friendly process manager that integrates directly into Nginx.
- opn – Opens stuff like websites, files, executables.
- semver – semver parser.
- cheerio – Fast, flexible, and lean implementation of core jQuery designed specifically for the server.
- require-uncached – Require a module bypassing the cache.
- Faker.js – Generate massive amounts of fake data.
- Bottleneck – A powerful rate limiter that makes throttling easy.
- stringify-object – Stringify an object/array like JSON.stringify just without all the double-quotes.
- strip-bom – Strip UTF-8 byte order mark (BOM) from a string/buffer/stream.
- shelljs – Portable Unix shell commands.
- nan – A header file filled with macro and utility goodness for making add-on development for across Node.js versions easier.
- ssh2 – An SSH2 client module.
- lazy-req – Require modules lazily.
- webworker-threads – Lightweight Web Worker API implementation with native threads.
- node-pre-gyp – Makes it easy to publish and install Node.js C++ addons from binaries.
- opencv – Bindings for OpenCV. The defacto computer vision library.
- common-errors – Common error classes and utility functions.
- atom-shell – Cross-platform desktop application shell.
- agenda – Lightweight job scheduling on MongoDB.
- node-modules.com – An alternative npm search engine with a more intelligent and personal results ranking.
- node weekly – Weekly e-mail round-up of Node.js news and articles.
- Node.js blog
- HowToNode – Teaching how to do various tasks in Node.js as well as teach fundamental concepts that are needed to write effective code.
- GitHub Linker – Chrome extension that linkifies dependencies in package.json on GitHub.
Here’s a simplified snippet for sending an in-memory string as an email attachment (a CSV file in this particular case).
If you are trying this with PDF, put special mention on stream.position = 0. As it will make the writer write the file from starting position always.
Whatever the source-type you care coming with convert that to memory-stream and the use the memory stream to create the attachment.
using (var stream = new MemoryStream())
using (var writer = new StreamWriter(stream)) // using UTF-8 encoding by default
using (var mailClient = new SmtpClient("localhost", 25))
using (var message = new MailMessage("email@example.com", "firstname.lastname@example.org", "Just testing", "See attachment..."))
stream.Position = 0; // read from the start of what was written
message.Attachments.Add(new Attachment(stream, "filename.csv", "text/csv"));